2D Branching Structures using RABBIT

The definitions show how to create 2D Branching Structures using RABBIT.
More about Branching Structures: http://algorithmicbotany.org/papers/abop/abop-ch1.pdf
The meanings of the symbols:

F move forward at distance L(Step Length) and draw a line
f move forward at distance L(Step Length) without drawing a line
+ turn left A(Default Angle) degrees
- turn right A(Default Angle) degrees
\ roll left A(Default Angle) degrees
/ roll right A(Default Angle) degrees
^ pitch up A(Default Angle) degrees
& pitch down A(Default Angle) degrees
| turn around 180 degrees
J insert point at this position
“ multiply current length by dL(Length Scale)
! multiply current thickness by dT(Thickness Scale)
[ start a branch(push turtle state)
] end a branch(pop turtle state)
A/B/C/D.. placeholders, used to nest other symbols

http://morphocode.com/work/rabbit/tutorials/2d-branching-structures-with-rabbit/